using System;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;
using BaseGames.Localization;

namespace BaseGames.Editor.Localization
{
    /// <summary>
    /// 本地化 CSV 导入/导出工具。
    ///
    /// 每个表导出为独立 CSV（含 UTF-8 BOM，Excel 中文不乱码），列顺序：key, ChineseSimplified, English, Japanese, Korean。
    /// 文件存放路径：Assets/_Game/Localization/Export/{TableName}.csv
    ///
    /// 导入：读取 CSV → 合并回写 Assets/_Game/Data/Localization/{Language}/{TableName}.json（经 LocalizationFileIO）
    ///
    /// 注：日常单表编辑请用「BaseGames / Localization / 表格编辑器」，此窗口用于批量多表导入导出。
    /// 菜单：BaseGames / Localization / CSV 导入导出工具
    /// </summary>
    public class LocalizationCsvTool : EditorWindow
    {
        [MenuItem("BaseGames/Localization/CSV 导入导出工具")]
        private static void Open()
        {
            var win = GetWindow<LocalizationCsvTool>("本地化 CSV 工具");
            win.minSize = new Vector2(480, 360);
        }

        // ── 状态 ─────────────────────────────────────────────────────────────

        private static readonly string[] s_allTables =
        {
            LocalizationTable.UI,
            LocalizationTable.Dialogue,
            LocalizationTable.Quest,
            LocalizationTable.Spells,
            LocalizationTable.Skills,
            LocalizationTable.Items,
            LocalizationTable.Character,
            LocalizationTable.Tutorial,
        };

        private const string ExportDir = "Assets/_Game/Localization/Export";
        private const string DataDir   = LocalizationPaths.DataRoot;

        private readonly bool[] _exportSelected = new bool[s_allTables.Length];
        private readonly bool[] _importSelected = new bool[s_allTables.Length];
        private string           _statusMessage  = "";
        private MessageType      _statusType     = MessageType.None;
        private Vector2          _scroll;

        // ── GUI ───────────────────────────────────────────────────────────────

        private void OnGUI()
        {
            _scroll = EditorGUILayout.BeginScrollView(_scroll);

            EditorGUILayout.Space(6);
            GUILayout.Label("📤  导出 → CSV", EditorStyles.boldLabel);
            EditorGUILayout.HelpBox(
                $"将 {DataDir}/ 中的 JSON 表导出为 CSV 文件（UTF-8 BOM，Excel 可直接打开）。\n" +
                $"目标目录：{ExportDir}/",
                MessageType.Info);

            EditorGUI.indentLevel++;
            for (int i = 0; i < s_allTables.Length; i++)
                _exportSelected[i] = EditorGUILayout.Toggle(s_allTables[i], _exportSelected[i]);
            EditorGUI.indentLevel--;

            EditorGUILayout.BeginHorizontal();
            if (GUILayout.Button("全选")) SetAll(_exportSelected, true);
            if (GUILayout.Button("全不选")) SetAll(_exportSelected, false);
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.Space(4);
            if (GUILayout.Button("▶ 导出选中表", GUILayout.Height(30)))
                RunExport();

            EditorGUILayout.Space(16);
            EditorGUILayout.LabelField("", GUI.skin.horizontalSlider);

            GUILayout.Label("📥  导入 ← CSV", EditorStyles.boldLabel);
            EditorGUILayout.HelpBox(
                $"读取 {ExportDir}/ 中的 CSV，合并回写至 {DataDir}/ JSON 文件。\n" +
                "已有 Key 覆盖，新增 Key 追加，不删除多余 Key。",
                MessageType.Info);

            EditorGUI.indentLevel++;
            for (int i = 0; i < s_allTables.Length; i++)
                _importSelected[i] = EditorGUILayout.Toggle(s_allTables[i], _importSelected[i]);
            EditorGUI.indentLevel--;

            EditorGUILayout.BeginHorizontal();
            if (GUILayout.Button("全选")) SetAll(_importSelected, true);
            if (GUILayout.Button("全不选")) SetAll(_importSelected, false);
            EditorGUILayout.EndHorizontal();

            EditorGUILayout.Space(4);
            if (GUILayout.Button("▶ 导入选中表", GUILayout.Height(30)))
                RunImport();

            EditorGUILayout.Space(8);
            if (!string.IsNullOrEmpty(_statusMessage))
                EditorGUILayout.HelpBox(_statusMessage, _statusType);

            EditorGUILayout.Space(6);
            EditorGUILayout.EndScrollView();
        }

        // ── 导出 ─────────────────────────────────────────────────────────────

        private void RunExport()
        {
            LocalizationManager.ClearEditorPreviewCache();
            int exported = 0;

            try
            {
                for (int ti = 0; ti < s_allTables.Length; ti++)
                {
                    if (!_exportSelected[ti]) continue;
                    string tableName = s_allTables[ti];

                    EditorUtility.DisplayProgressBar("导出 CSV", $"导出 {tableName}…", (float)ti / s_allTables.Length);

                    // 经统一门面读取各语言字典（正确路径），交给 LocalizationCsv 写出（含 BOM）
                    var langDicts = new Dictionary<Language, Dictionary<string, string>>();
                    bool any = false;
                    foreach (var lang in LocalizationFileIO.AllLanguages)
                    {
                        var dict = LocalizationFileIO.Read(lang, tableName);
                        langDicts[lang] = dict;
                        if (dict.Count > 0) any = true;
                    }

                    if (!any)
                    {
                        Debug.LogWarning($"[CsvTool] 表「{tableName}」无数据，跳过导出。");
                        continue;
                    }

                    LocalizationCsv.ExportToFile(tableName, langDicts);
                    exported++;
                }
            }
            finally
            {
                EditorUtility.ClearProgressBar();
            }

            AssetDatabase.Refresh();
            SetStatus($"✅ 成功导出 {exported} 个表到 {ExportDir}/", MessageType.Info);
        }

        // ── 导入 ─────────────────────────────────────────────────────────────

        private void RunImport()
        {
            int imported = 0;
            int errors   = 0;

            try
            {
                for (int ti = 0; ti < s_allTables.Length; ti++)
                {
                    if (!_importSelected[ti]) continue;
                    string tableName = s_allTables[ti];

                    EditorUtility.DisplayProgressBar("导入 CSV", $"导入 {tableName}…", (float)ti / s_allTables.Length);

                    try
                    {
                        // 合并语义 + 正确格式/目录/Addressable 注册，全部由统一门面处理
                        int affected = LocalizationCsv.ImportFileToJson(tableName);
                        if (affected == 0)
                        {
                            Debug.LogWarning($"[CsvTool] CSV 文件不存在或为空，跳过：{ExportDir}/{tableName}.csv");
                            continue;
                        }
                        imported++;
                    }
                    catch (Exception ex)
                    {
                        Debug.LogError($"[CsvTool] 导入「{tableName}」失败：{ex.Message}");
                        errors++;
                    }
                }
            }
            finally
            {
                EditorUtility.ClearProgressBar();
            }

            AssetDatabase.Refresh();
            LocalizationManager.ClearEditorPreviewCache();

            string msg = errors == 0
                ? $"✅ 成功导入 {imported} 个表。"
                : $"⚠ 导入 {imported} 个表，{errors} 个失败（见控制台）。";
            SetStatus(msg, errors == 0 ? MessageType.Info : MessageType.Warning);
        }

        // ── 工具函数 ─────────────────────────────────────────────────────────

        private static void SetAll(bool[] arr, bool v)
        {
            for (int i = 0; i < arr.Length; i++) arr[i] = v;
        }

        private void SetStatus(string msg, MessageType type)
        {
            _statusMessage = msg;
            _statusType    = type;
            Repaint();
        }
    }
}